- Do a better job at drawing the merge lines by selecting the shortest path
from the revision boxes. An analysis is now done whether the source and
destinations should be on the left or right side.
- Fix the left_right case for merge lines to display correctly.
- Fix a +/-1 error on the merge lines to account for both rounding errors and
the shadow of the revision boxes.
- Add configuration option 'merge_on_tag' to force the left_right case to
display merge lines on the tags instead of on the top/bottom sides. This
also solves imagemap overlaps where multiple sources or destinations would
be displayed at the same position.
- Fix the imagemap function to record the correct position of the merges.